Thomas



v UNITED- STATES PATENT OFFICE,

THOMAS O. ST. JOHN, OF WILLOUGHBY, OHIO, ASSIGNOR TO. THE NEW' YORKSTEAM COMPANY, OF NEW YORK. l

STEAM-OVEN.

SPECIFICATION forming part of Letters Patent No. 326,170, datedSeptember 15, 1885.

Application filed Se; tomber 27, i884. (No model.)

To aZZ whom it may concern: l

Beit known that I, THOMAS C. Sr. JOHN, a citizen of the United States,`residing at Willoughby, in the county of Lake and State of Ohio, haveinvented a new and useful Steam-Oven, of which the following is aspecication.

My invention is of that class of apparatus in which articles are cookedby dry heat,- aud it consists of the' combination ofa chamberedsteam-table, steam-pipes, andan inclosing jacket of non-conductingmaterial, all of which are hereinafter fully described.

In the accompanying drawing,which forms part of this specification,similar letters of referencindicate corresponding parts.

rlhe drawing is an isometric perspective vView of my steam-oven,portions of the jacket being represented as broken away for the purposeof exposing to View the steampipes.

The upper and lower plates of the chambcred steam-table A2 are heldtogether with stays and ribs, or are connected in any -customary manner,so as to fully resist the pressure of the contained steam. The table Aissupported by the legs A', formed, preferably, of pipe. The steampipe eforms a continuous coil or series of pipes connected together, and isconnected with the table A2 at e3.

Steam is admitted by the valve e2, and traverses the continuous pipe e',passing first through those sections which compose the top, and thenthrough the sections which compose the sides of the oven. It then passesinto the interior of the table A2 at the opening e3, and thence, withthe water of condensation, through the escape-pipe a.

The jacket E is composed of an outer case, f, and of an inner case, f',which are made of thin sheets of metal, and of a filling between thecasesf and f of mineral wool orothersuitablenon-conducting material. Thejacket is secured to the outer edges or ange of they table A2, and fullyincloses and surrounds the pipes e', together with the spaces around thepipes, and the space inclosed by uously.

interior of the oven.

The door e closes the opening through the jacket E, by which access ishadV to the interior of the oven. It is composed of sheets of metal,which inclose a iilling of mineral Wool or other` suitablenon-conductiug material, and is hung or attached to the table A2 in suchmanner that, when open, it will lie in a horizontal position on a planecontinuouswith the bottom of the oven, and will afford a support toarticles when they are being placed in or removedfrom the oven.

Steam-cooking apparatus of various kinds has heretofore been made with acylindricalor rectangular cookingvessel within an outer shell of similarshape, steam being admitted between the two to form a steamjacket. Pipeshave also been carried through and around the chambers of the heatingapparatus of various kinds. My invention is distinctive, from the factthat I construct the oven with a flat bottom heated by steam, as in anordinary steam-table, and inclose a space in the upper part of the ovenwith steam-pipes arranged in coils, one above the other, as described,with an inlet for the steam at the top and an outlet for the wavter ofcondensation at the bottom, so that al1 air contained in the pipes isimmediately driven out by the current circulating in one direction,andthe full quantity of heat can be applied promptly andmaintainedcontin- The operation is obviously as follows: Steam is`admitted to the pipes e' and to the table A2. The articles to be bakedare then placed within the oven in. suitable vessels,

and the door is closed.

When the articles are suiiiciently cooked by the heat imparted from thesteam, the door is opened Aand the articles are removed.. Y

Having thus fully described my invention,

what I claim as new, andvdesire to secure by Letters Patent, is

In the construction of ovens, a flat steamthe pipes and the table, whichlatter is the jaoketed'bottoi, A2, and a series of horiing-jacket, E',packed with non-conducting zontal coils arranged to inclose the top andmaterial g, substantially as and for the pur- Io sides, With the steamintroduced through the poses described. valve e2 at the highest point inthe coils, and

5 the Water of condensation carried with the steam throughout the lengthof the coils to Witnesses: the tstea'm-jaeketed bottom7 and thence tothe S. G. METOALF, Waste-pipe, in combination with 'an inelos- H. V.YORK.

THOMAS C. ST. JOHN.

